Flash Wireless Hearing Aid Compatibility

The Hearing Aid Compatibility (HAC) Rating system was developed by the wireless industry to apply ratings to phones that may be compatible with hearing devices.

There are two types of ratings: M-Ratings and T-Ratings. M-Ratings are likely to generate less interference to hearing devices than unrated phones. Within the M-Ratings, there are M4 and M3, M4 being better than M3. As for T-Ratings, they are likely to be more usable with hearing device's telecoil than unrated phones. Within the T-Ratings, there are T4 and T3, T4 being better than T3.